Abstract
The antithesis of nature and freedom is the central idea of Kant's philosophy. It is the direct expression of its postulated division of all existing things into the world of phenomena, which in their sum-total constitute nature, and its original foundation—the world of things in themselves, which lie beyond the categorial determinations of nature. Necessity and causal relations, like space and time, apply only to the world of phenomena; the world of things in themselves is free of these determinations and, therefore, constitutes the realm of freedom—freedom from the intractable laws of nature. Thus, Kant, on the one hand, proves the unconditional subsumption of phenomena under the laws of nature, under the strictest determinism, and, on the other, insists just as decisively that freedom is the first, pretemporal link in the cause-and-effect chain of events. True, the existence of this original freedom is unprovable; it is unknowable, supersensible, and transcendent. But if we agree that there are not only phenomena but also things in themselves, then the conclusion about freedom is fully justified. If, on the other hand, we reject the existence of things in themselves, then we deny at the same time any possibility of freedom, for there are no exceptions in natural determinism.